"That it is," 'Dora agrees, and then begins eyeing the bunk with a critical gaze, nodding to herself now and again.

Finally she raises her wand and begins casting the spells; one large silencing charm takes care of most of the job, and a few extra reinforcements on the air vents should do the job.

If there's one thing Tonks has learned well in the last year or so, it's silencing charms.

"There. I think that ought to hold you for a bit. They do wear off now and again, though, so if you start to get complaints just let me know and I'll touch 'em up."